package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO,employee);
        //自动复制哪些DTO中没有的属性
        employee.setStatus(StatusConstant.ENABLE);
        //设置默认密码
        String passward = DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes());
        employee.setPassword(passward);
        employee.setCreateTime(LocalDateTime.now()); // ok
        employee.setUpdateTime(LocalDateTime.now());// ok
        //设置当前管理员的用户id
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.insertEmployee(employee);
    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        // select * from employee limit 0, 10
        // 开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> records = page.getResult();

        return new PageResult(total,records);
    }
    /*
     *新增员工
     *
     */
//      Employee employee = new Employee(employeeMapper);                      // 写上对应方法

                            // 对象转换为实体，new Empoyee()

                            //  对象属性拷贝，用工具类 BeanUtils.coppyProperities(前，拷贝后)
//    BeanUtils.CopyProperities(Employee, employee);
    // 设置账号状态，1，正常，0锁定

    // 用常量类，常量维护，调用commen -> constanst（状态就用，启用/禁用）

    // 方法：setStatus, setPassword（用常量的方式引用）


    // 设置当前创建记录的创建更改时间



    // 设置当前记录的创建人 id 和 修改人 id

    // 调用insert 方法，扩展insert()

}
